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EXAMPLE 20
Instructions
![](examples/combinatorics/en/2-20_en.gif)
Solution
![](examples/combinatorics/en/2-20s_en.gif)
Possible answers
Inserted possible answers are below. Red answer represents the right answer.
A)
![](examples/combinatorics/en/2-20a_en.gif)
B)
![](examples/combinatorics/en/2-20b_en.gif)
C)
![](examples/combinatorics/en/2-20c_en.gif)
D)
![](examples/combinatorics/en/2-20d_en.gif)
E)
![](examples/combinatorics/en/2-20e_en.gif)
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